Field glossary

Scale

A hard mineral deposit, mostly calcium and magnesium hardness, that bakes onto hot surfaces and insulates them

Used across 3 Anvilfield field guides, most in HVAC.

Also defined as

Plumbing: Calcium and magnesium deposited as a hard crust where water is heated or evaporates
Hard mineral deposit from calcium and magnesium in hard water, the number one cause of ice-machine failure

Where this shows up